| 摘要 |
<p>Falling-film apparatus for the equicurrent evaporation of a solution, consisting of a tube-bundle heat-exchanger (9), in which exchanger the feed distributor (2) allows the solution (1) to fall onto the uppermost tube sheet (3) and the pipes project from said uppermost sheet by means of inlet sleeves (7) supplied with tangential distribution slots (6), characterized in that:… said sleeves are closed at their uppermost end (8);… said apparatus is provided (outside the exchanging pipes) with means (11) for the recycle of the released vapors from the bottom of the exchanger to a level higher than said uppermost end of the sleeves.</p> |
